I have a failed PRV on my home, that was build in '78. Guessing it's original to the house, and since I've owned the house, I've had about 95psi of pressure. Didn't even know I had a PRV until I went digging for the main to install one.
Anywho, upon unearthing the one I have, it looks like I have the water meter, to the house shutoff, to the current PRV in Schedule 80 threaded PVC, then the PRV, then I'm guessing PB (yeah, I know, ugh). Somewhere between that, and the house, it switches to copper (in the house is all copper, and it's copper coming through the foundation into the crawl space).
So, my question is, if I get a PRV that's union on one side, and something like threaded female on the other, do I just get a barbed nipple to connect to the PB, and screw the union end to the schedule 80? Or should I wait until summer, and make this a big project, and replace the PB while I'm doing the PRV? In that case, should I use CPVC (since you seem to only be able to get PEX up to 1/2", and the current PB is 3/4")? How do you connect threaded to CPVC?
Sorry, I'm a bit of a jack of all trades, but this is getting into semi-serious plumbing.
Worst case, I just dig up all the PB main, and hire a plumber to come out and replace it... at least then it would be a much shorter job since they wouldn't have to dig.